<template id="b-temp">
  <!-- vue实例外创建 -->
  <div class="b-demo">
    <p>this b</p>
    <el-button type="primary" @click="$emit('say', 'B button')">
      Button
    </el-button>
  </div>
</template>

<script>
export default {
  name: 'B'
}
</script>
